Immune Therapy for Pancreatic Cancer December 16, 2014 If you experience technical difficulty during the presentation: Contact WebEx Technical Support directly at: US Toll Free: 1-866-229-3239 Toll Only: 1-408-435 -7088 or Submit a question to the Event Producer via the Q&A Panel For international support numbers visit: http://support.webex.com/support/phone-numbers.ht Questions may be submitted anytime during the presentation. To submit questions: Type your questions in the text entry box Click the Send Button Please direct your questions to “All Panelists” in the drop down 1 Immune therapy for pancreatic cancer Robert Vonderheide, MD, DPhil Abramson Cancer Center University of Pennsylania Philadelphia, PA December 16, 2014 The clinical and biological challenges: Early detection is difficult Suboptimal response to standard therapies Main tumor mutation (Kras) is currently ‘undruggable’ Hostile microenvironment in pancreatic cancer 2 Scientific knowledge What we know about pancreatic cancer 1990 2000 2014 Year Attendance at a national scientific meeting on pancreatic cancer Number of Attendees >450 <30 2003 2014 Year 3 Scientific publications per year Massive increase in the depth and breadth of research activity in pancreatic cancer 1970 1985 1995 2001 2003 2005 2007 2009 2011 2012 Publications on breast cancer in 2012: 13,925 in 2002: 5,090 We are here 4 Redesigned chemotherapy for pancreatic cancer • Two new combinations of drugs for patients with metastatic disease – FOLFIRINOX (Conway et al, NEJM, 2011) – Gemcitabine/Abraxane (Von Hoff et al, NEJM, 2013) • Rates of major tumor regression to initial therapy for metastatic disease have gone from <5% to 25%-30%, with better survival – But still not a ‘cure’ • Implications and next steps – It’s not just gemcitabine alone anymore – Provides a better initial approach to stabilize our patients so additional therapies, such as immune therapy, can be added – Chemotherapy does not ‘ruin’ the immune system The challenge and opportunity of stroma 5 Immune biology of pancreatic cancer Bayne and Vonderheide, Curr Opin Immunol, 2013 Cancer immunotherapy trials for patients with pancreatic cancer Treatment clinical trials for PDA * • Open trials • Immunotherapy trials Percentage of all trials exploring immunotherapy for PDA • Same calculation in melanoma: • Same calculation in breast cancer: 2014 2013 372 20 385 13 5.4% 3.0% 22.1% 3.9% 17.0% 1.0% * Clinicaltrials.gov, assessed by RHV 6 Monoclonal antibodies can stimulate the immune system Negative immune checkpoints: the ‘brakes’ Pardoll, Nat Rev Can, 2012 7 Negative immune checkpoints: the ‘brakes’ Pardoll, Nat Rev Can, 2012 PD-1 antibody with and without CTLA-4 antibody Pembrolizumab for patients with metastatic melanoma Nivolumab plus ipilimumab for patients with metastatic melanoma Hamid et al, NEJM, 2013 Wolchok et al, NEJM, 2013 8 Checkpoint antibody clinical trials in patients with pancreatic cancer Results so far using antibodies against negative immune checkpoints in patients with pancreatic cancer • • Single agent ipilimumab – no responses (Royal et al., J Immnunother, 2010; Le et al, J Immunother, 2013) Single agent αPD-L1 – no responses (Brahmer et al., NEJM, 2012) Clinicaltrials.gov Immune cells in pancreatic cancer Melanoma All leukocytes T cells Carcinoma 9 Strategies to tip the balance of immunity Turn on T cells Turn off negative factors Immunity No immunity IMPRESS Trial: Algenpantucel-L vaccine with chemoradiation therapy for patients with resectable PDA Tumor-specific cancer cell lines modified to express the carbohydrate alpha-gal PILLAR trial open for patients with locally advanced non resectable disease NCT01836432 10 Combining vaccines with checkpoint antibody for patients with pancreatic cancer Dual component gene therapy vaccine • • • • GVAX pancreas – irradiated, whole cell tumor vaccine, secretes GM-CSF LADD Listeria – live, attenutated Listeria monocytogenes expressing mesothelin Survival benefit in patients given both components rather than GVAX alone, now a randomized study nationwide, NCT02004262 Next step is to add anti-PD-1 antibody (trial at Johns Hopkins to open soon, NCT02243371) GVAX plus ipilimumab • Patients who receive FOLFIRINOX then go on to receive GVAX pancreas plus anti-CTLA-4 antibody (trial at Johns Hopkins, NCT01896869) The road to personalized cancer vaccines Vonderheide and Nathanson, Nature Medicine, 2013 11 Engineered T cell therapy for pancreatic cancer 1. Remove the immune cells from blood 2. Engineer killer lymphocytes in a clinical laboratory Anti-mesothelin” NCT01897415 4. Give patient engineered T cells 3. Prepare cells for re-infusion Porter et al, NEJM, 2011 Grupp et al, NEJM, 2013 Maude et al, NEJM, 2014 Beatty et al, Can Immunol Res, 2014 12 Testing CD40 antibodies as immune therapy for pancreatic cancer in the laboratory Dendritic cell T cell Tumor CD40 Activation Anti-CD40 mAb Testing CD40 antibodies as immune therapy for pancreatic cancer in the laboratory Before treatment After treatment CD40 antibody for immune activation Beatty et al, Science, 2011 13 CD40 antibody immune therapy for pancreatic cancer After Treatment Beatty et al, Science, 2011 CD40 antibody for patients undergoing surgery To open soon at Penn: Phase I study of preoperative CD40 antibody +/- chemo for patients with newly diagnosed resectable pancreatic carcinoma CD40 antibody +/- Gem/nab-paclitaxel) Resect Dx Day 1 Safety Gem/nP + CD40 antibody x 4 cycles observe 15 Outcome Tissue and blood biomarkers 14 Recalcitriol with chemotherapy for patients with resectable pancreatic cancer • • • Expression profiling of tumor stellate cells revealed Vitamin D receptor as a potential regulator of function Sherman et al, Cell, 2014 Vitamin D agonists alter tumor stroma and facilitate tumor death in combination with chemotherapy in laboratory studies Phase I study of paricalcitol and chemotherapy delivered prior to, and again after, surgical resection of primary tumor – At Penn, NCT02030860 Mutant Kras oncogene • More than 95% of all patients with pancreatic ductal adenocarcinoma have mutations in Kras in the tumor • There are cooperating mutations but no other common ‘driver’ mutations • Does mutant Kras cause such immune suppression? Pasca di Magliano and Logsdon, Gastroenterology, 2013 Biakin et al, Nature, 2012 15 The Ras Initiative http://www.cancer.gov/researchandfunding/priorities/ras Pancreatic cancer is a clinical EMERGENCY Calculated to become the second leading cause of cancer death in 5 years 16 Research in clinical trials are critical Hoos et al, J Clin Oncology, 2013 Still, only 4% of patients with pancreatic cancer ever go on a clinical trial Conclusions • Research efforts in pancreatic cancer are accelerating • New discoveries are driving novel therapies, especially immune therapies • Clinical trials are critical 17 Thank you for your participation. If you have questions, please contact our Patient and Liaison Services (PALS) program at (877) 272-6226 or e-mail [email protected]. www.pancan.org or wagehope.org 18